WO2012089289A1 - Endoscope having a shaft tube - Google Patents

Endoscope having a shaft tube Download PDF

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Publication number
WO2012089289A1
WO2012089289A1 PCT/EP2011/005284 EP2011005284W WO2012089289A1 WO 2012089289 A1 WO2012089289 A1 WO 2012089289A1 EP 2011005284 W EP2011005284 W EP 2011005284W WO 2012089289 A1 WO2012089289 A1 WO 2012089289A1
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WO
WIPO (PCT)
Prior art keywords
cross
tube
section
endoscope
shaft tube
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PCT/EP2011/005284
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German (de)
French (fr)
Inventor
Martin Wieters
Philipp ABEL
Original Assignee
Olympus Winter & Ibe Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympus Winter & Ibe Gmbh filed Critical Olympus Winter & Ibe Gmbh
Priority to JP2013541225A priority Critical patent/JP5705328B2/en
Priority to US13/885,797 priority patent/US9474437B2/en
Priority to CN201180052519.9A priority patent/CN103189780B/en
Publication of WO2012089289A1 publication Critical patent/WO2012089289A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163—Optical arrangements
    • A61B1/00165—Optical arrangements with light-conductive means, e.g. fibre optics
    • A61B1/00167—Details of optical fibre bundles, e.g. shape or fibre distribution
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2461—Illumination
    • G02B23/2469—Illumination using optical fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides

Definitions

  • the invention relates to an endoscope referred to in the preamble of claim 1 Art.
  • Such endoscopes have an elongated shaft intended for insertion into the body to be examined, which is essentially formed by two tubes made of etaii, namely the outer shaft tube, which forms the stable and sealing outer wall of the shaft, and the fiber tube, the inner one lies and the intended for receiving the fibers of the optical fiber bundle free cross-section to the inside, so the image guide out limited.
  • the image conductor with its distally arranged lens must find space, which is not a problem in the usual rotationally symmetrical formation of image conductors.
  • more and more endoscopes are formed with two viewing directions, as shown in DE 10 2009 020 262 AI. This can, for. B. switchable, be looked in straight direction and in an oblique direction.
  • the image guide can remain round over its substantial length.
  • a cross-sectional widening in the direction of the objective part for the oblique viewing direction is required. This leads to constructive problems.
  • the invention can also be used in an endoscope with a continuously adjustable viewing direction, as known from DE 10 2009 049 843 B3.
  • the object of the present invention is to reduce the problems associated with the configuration of the fiber tube.
  • the fiber tube is formed with an oblong cross section.
  • the possibility is created, advantageously according to claim 2 in the fiber tube to accommodate a lens that is designed for two viewing directions and in a cross-sectional direction has a greater extent than perpendicular thereto.
  • two partial bundles of the optical fiber bundle are arranged in each of the partial transverse sections, of which in each case one straight-radiating and one obliquely radiating can be formed, so that an excellent illumination results.
  • the shaft tube according to claim 5 is round. This is a cross-sectional shape which is well suited for the construction according to the invention and which also has the advantage of good availability.
  • the fiber tube is advantageous according to claim 6 oval.
  • Fig. 1 is a side view of an endoscope according to the invention and 2 and 3 sections along the lines 2 - 2 and 3 - 3 in Fig. 1st
  • FIG. 1 shows a side view of an endoscope 1 with a shaft enclosed by a shaft tube 2 and extending distally from a main body 3.
  • the end face of the shaft of the endoscope 1 consists bent back from two end face parts 9 and 10, which are shown in an end view in Fig. 2.
  • the end face part 9 is perpendicular to the arrow 5 and the end face part 10 perpendicular to the arrow 7, ie in each case perpendicular to the viewing direction.
  • a window 11, or 12 is arranged, through which the lens parts 6, and 8 can look in the direction of arrows 5 and 7 respectively.
  • the viewing direction 5 is exactly straight ahead, that is shown in the direction of the axis of the shaft tube 2 and the line of sight 7 is at 45 °. More usual viewing directions are instead at about 12 ° for the viewing direction 5 and about 30 ° for the viewing direction 7.
  • an optical fiber bundle 13 is provided, the proximal end of which is located in a light conductor connecting piece 14, which in a conventional design extends laterally from the main body 3 and can be formed in a known configuration for connecting a light conductor cable to the light transported from a remote light source to the proximal end of the optical fiber bundle 13 and can be coupled there in this.
  • the optical fiber bundle 13 is divided in the main body 3 in a total of four sub-beams 15, 16, 17 and 18, which can be seen in the cross section of Fig. 3. In Fig. 1, only the two lying to the viewer sub-beams 15 and 16 are seen. The sub-beams 17 and 18 are parallel to the sub-beams 15 and 16.
  • the partial bundles are aligned parallel to the objective parts 6 and 8, or to the arrows of the viewing directions 5 and 7, and terminate in the front face parts 9 and 10 with their radiating end faces, as shown in FIG.
  • two such bundles may be used, which are supplied separately and branch differently, so as to be associated with a respective viewing direction. If one compares with FIG. 3, then one of these bundles can branch into the partial bundles 16 and 18 and provides the illumination in the viewing direction 7, while the other bundle supplies the partial bundles 15 and 17 and thus the straight-ahead direction 5. By switching the two bundles on and off, the light in the directions 5 and 7 can thus be switched separately.
  • the image conductor 4 ends, as shown in FIG. 1, proximally in an eyepiece 19, in its place a video camera is coupled.
  • a video camera instead of the elongated shaft 4 passing through the image guide 4 can be arranged in the distal end region at the point where the lens parts 6 and 8 to the common image guide 4, a video camera.
  • Fig. 3 shows, looking in the distal direction, a cross section of the shaft tube 2 with cut image guide 4 and the cut part bundles 15, 16, 17 and 18 of the optical fiber bundle. It is here also a fiber tube 20 shown cut represents, over the entire length of the shaft tube 2 the image guide 4, 6, 8, from the optical fibers, so the sub-beams 15 to 18, separates.
  • the fiber tube 20 is formed with an oval cross section, preferably with a constant cross section over the length, in order to reduce manufacturing problems. It can record relatively problematic in its oval cross-section, the two lens parts 6 and 8, which lie one above the other in the illustration of FIG.
  • the partial cross sections 21 and 22 offer favorable cross-sectional shapes for accommodating the sub-beams 15 and 16, and 17 and 18, respectively.
  • the shaft tube 2 could e.g. be formed with polygonal cross-section or also be oval, but with the greatest cross-sectional extension advantageously perpendicular to that of the fiber tube 20.
  • the fiber tube 20 may be formed with a different cross-section, e.g. oblong rectangular.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Pathology (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Endoscopes (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

The invention relates to an endoscope (1) having a shaft tube (2) through which a fibre tube (20) runs which surrounds an image conductor (4) with a distal objective (6, 8), wherein an optical fibre bundle (13) is disposed in the free cross-section (21, 22) between the fibre tube (20) and the shaft tube (2), wherein said endoscope is characterised in that the fibre tube (20) has an elongate cross-section.

Description

Endoskop mit einem Schaftrohr  Endoscope with a shaft tube
Die Erfindung betrifft ein Endoskop der im Oberbegriff des Anspruches 1 genannten Art. The invention relates to an endoscope referred to in the preamble of claim 1 Art.
Derartige Endoskope weisen einen langgestreckten, zum Einführen in den zu untersuchenden Körper bestimmten Schaft auf, der im Wesentlichen aus zwei aus etaii bestehenden Rohren ausgebildet ist, nämlich dem äußeren Schaftrohr, das die stabile und abdichtende Außenwand des Schaftes bildet, und dem Faserrohr, das innen liegt und den zur Aufnahme der Fasern des Lichtleitfaserbündels bestimmten freien Querschnitt nach innen, also zum Bildleiter hin, begrenzt. Such endoscopes have an elongated shaft intended for insertion into the body to be examined, which is essentially formed by two tubes made of etaii, namely the outer shaft tube, which forms the stable and sealing outer wall of the shaft, and the fiber tube, the inner one lies and the intended for receiving the fibers of the optical fiber bundle free cross-section to the inside, so the image guide out limited.
Eine solche gattungsgemäße Konstruktion zeigt die DE 10 2007 002 042 B4. In üblicher Ausbildung ist hierbei der Bildleiter rund. Er besteht z. B. aus den runden Linsen eines Satzes von Relaislinsen oder aber aus einem Bildleiterfaserbündel runden Querschnittes. Entsprechend ist auch das Faserrohr rund. Der freie Querschnitt zwischen den beiden Rohren hat die übliche halbmondförmige Querschnittsausbildung. Such a generic construction is shown in DE 10 2007 002 042 B4. In usual training here is the picture ladder round. He exists z. B. from the round lenses of a set of relay lenses or from a Bildleiterfaserbündel round cross-section. Accordingly, the fiber tube is round. The free cross section between the two tubes has the usual crescent-shaped cross-sectional formation.
BESTÄTIGUNGSKOPIE In den runden Querschnitt des Faserrohres muss der Bildleiter mit seinem distal angeordneten Objektiv Platz finden, was bei der üblichen rotationssymmetrischen Ausbildung von Bildleitern unproblematisch ist. Immer häufiger werden aber Endoskope mit zwei Blickrichtungen ausgebildet, wie dies die DE 10 2009 020 262 AI zeigt. Damit kann, z. B. umschaltbar, in Geradeausrichtung und in einer dazu schräg stehenden Richtung geblickt werden. Dabei kann der Bildleiter über seine wesentliche Länge rund bleiben. Im distalen Endbereich, also im Bereich des Objektivs, ist allerdings eine Querschnittserweiterung in Richtung des Objektivteiles für die schräge Blickrichtung erforderlich. Das führt zu konstruktiven Problemen. Die Erfindung kann auch in einem Endoskop mit kontinuierlich verstellbarer Blickrichtung, wie aus der DE 10 2009 049 843 B3 bekannt, eingesetzt werden. CONFIRMATION COPY In the round cross-section of the fiber tube, the image conductor with its distally arranged lens must find space, which is not a problem in the usual rotationally symmetrical formation of image conductors. However, more and more endoscopes are formed with two viewing directions, as shown in DE 10 2009 020 262 AI. This can, for. B. switchable, be looked in straight direction and in an oblique direction. The image guide can remain round over its substantial length. In the distal end region, ie in the region of the objective, however, a cross-sectional widening in the direction of the objective part for the oblique viewing direction is required. This leads to constructive problems. The invention can also be used in an endoscope with a continuously adjustable viewing direction, as known from DE 10 2009 049 843 B3.
Versucht man, diese distale Querschnittserweiterung in einem runden Faserrohr unterzubringen, so muss dieses vergrössert werden. Das führt zu einer wesentlichen Verringerung des freien Querschnittes und somit zu einer Verminderung der Anzahl von Lichtleitfasern. Die Lichtübertragung verschlechtert sich und das Bild wird dunkler. Ferner bietet der halbmondförmige freie Querschnitt zwischen den beiden Rohren hinsichtlich der Unterbringung des Lichtieitfaserbündels eine Reihe von Nachteilen. Er beschränkt beispielsweise die Möglichkeiten bei der distalen Anordnung der Abstrahlfläche des Lichtieitfaserbündels. If one tries to accommodate this distal cross-sectional enlargement in a round fiber tube, then this must be enlarged. This leads to a substantial reduction of the free cross-section and thus to a reduction in the number of optical fibers. The light transmission deteriorates and the image becomes darker. Furthermore, the crescent-shaped free cross-section between the two tubes provides a number of disadvantages in terms of accommodating the Lichtieitfaserbündels. For example, it limits the possibilities in the distal arrangement of the emission surface of the Lichtieitfaserbündels.
Die Aufgabe der vorliegenden Erfindung besteht darin, die Probleme im Zusammenhang mit der Konfiguration des Faserrohres zu verringern. The object of the present invention is to reduce the problems associated with the configuration of the fiber tube.
Diese Aufgabe wird mit den Merkmalen des Kennzeichnungsteiles des Anspruches 1 gelöst. Erfindungsgemäß ist das Faserrohr mit länglichem Querschnitt ausgebildet. Damit wird die Möglichkeit geschaffen, vorteilhaft gemäß Anspruch 2 im Faserrohr ein Objektiv unterzubringen, das für zwei Blickrichtungen ausgebildet ist und in einer Querschnittsrichtung eine größere Erstreckung aufweist als senkrecht dazu. This object is achieved with the features of the characterizing part of claim 1. According to the invention, the fiber tube is formed with an oblong cross section. Thus, the possibility is created, advantageously according to claim 2 in the fiber tube to accommodate a lens that is designed for two viewing directions and in a cross-sectional direction has a greater extent than perpendicular thereto.
Durch die ovale Ausbildung des Faserrohres wird dabei dessen Querschnittsfläche relativ klein gehalten, so dass ein großer freier Querschnitt zwischen den Rohren bleibt, in dem somit viel Licht transportiert werden kann. Zum anderen bietet sich vorteilhaft gemäß Anspruch 3 die Möglichkeit, die erfindungsgemäß sich ergebende Querschnittskonfiguration dazu zu nutzen, um in dem Schaf trohr zu beiden Seiten des ovalen Faserrohres zwei Teilquerschnitte auszubilden, in denen jeweils getrennte Teile des Lichtleitfaserbündels verlegt werden können. Gegenüber der ungünstigen Querschnittsform des freien Querschnittes bei der bekannten Konstruktion ergibt sich damit die Möglichkeit einer symmetrischeren Lichtabstrahlung. Due to the oval shape of the fiber tube while the cross-sectional area is kept relatively small, so that a large free cross section between the tubes remains, in which thus a lot of light can be transported. On the other hand, it is advantageous according to claim 3, the possibility to use the present invention resulting cross-sectional configuration to form two partial cross-sections in the sheep trohr on both sides of the oval fiber tube, in each of which separate parts of the optical fiber bundle can be installed. Compared to the unfavorable cross-sectional shape of the free cross section in the known construction, this results in the possibility of a more symmetrical light emission.
Vorteilhaft gemäß Anspruch 4 sind dabei in jedem der Teilquerschitte je zwei Teilbündel des Lichtleitfaserbündels angeordnet, von denen jeweils eines geradeausstrahlend und eines schräg abstrahlend ausgebildet sein kann, so dass sich eine hervorragende Beleuchtung ergibt. Advantageously, according to claim 4, two partial bundles of the optical fiber bundle are arranged in each of the partial transverse sections, of which in each case one straight-radiating and one obliquely radiating can be formed, so that an excellent illumination results.
Vorteilhaft ist das Schaftrohr gemäss Anspruch 5 rund. Dies ist eine für die er- findungsgemässe Konstruktion gut geeignete Querschnittsform,die zudem den Vorteil guter Verfügbarkeit hat. Aus denselben Gründen ist das Faserrohr vorteilhaft gemäss Anspruch 6 oval. Advantageously, the shaft tube according to claim 5 is round. This is a cross-sectional shape which is well suited for the construction according to the invention and which also has the advantage of good availability. For the same reasons, the fiber tube is advantageous according to claim 6 oval.
In der Zeichnung ist die Erfindung beispielsweise und schematisch dargestellt. Es zeigen: In the drawing, the invention is shown for example and schematically. Show it:
Fig. 1 eine Seitenansicht eines erfindungsgemäßen Endoskopes und Fig. 2 und 3 Schnitte nach den Linien 2 - 2 bzw. 3 - 3 in Fig. 1. Fig. 1 is a side view of an endoscope according to the invention and 2 and 3 sections along the lines 2 - 2 and 3 - 3 in Fig. 1st
Fig. 1 zeigt in Seitenansicht ein Endoskop 1 mit einem von einem Schaftrohr 2 umschlossenen Schaft, der sich distal von einem Hauptkörper 3 erstreckt. FIG. 1 shows a side view of an endoscope 1 with a shaft enclosed by a shaft tube 2 and extending distally from a main body 3.
Im Inneren des Schaftrohres 2 ist ein in Fig. 1 gestrichelt dargestellter Bildleiter 4 angeordnet, der in seinem distal angeordneten Objektivbereich ein in Richtung des Pfeiles 5 geradeausblickendes Objektivteil 6 und ein in Richtung des Pfeiles 7 schrägblickendes Objektivteil 8 aufweist. In the interior of the shaft tube 2 a in Fig. 1 shown in phantom image guide 4 is arranged, which has a straight ahead in the direction of arrow 5 objective part 6 and an oblique-looking in the direction of arrow 7 objective part 8 in its distally disposed lens area.
Die Stirnfläche des Schaftes des Endoskopes 1 besteht abgeknickt aus zwei Stirn- flächenteilen 9 und 10, die in einer Stirnansicht in Fig. 2 dargestellt sind. Dabei steht der Stirnflächenteil 9 senkrecht zum Pfeil 5 und der Stirnflächenteil 10 senkrecht zum Pfeil 7, also jeweils senkrecht zur Blickrichtung. In jedem der Stirnflächenteile ist ein Fenster 11, bzw. 12 angeordnet, durch das die Objektivteile 6, bzw. 8 in Richtung der Pfeile 5 bzw. 7 blicken können. The end face of the shaft of the endoscope 1 consists bent back from two end face parts 9 and 10, which are shown in an end view in Fig. 2. In this case, the end face part 9 is perpendicular to the arrow 5 and the end face part 10 perpendicular to the arrow 7, ie in each case perpendicular to the viewing direction. In each of the face parts, a window 11, or 12 is arranged, through which the lens parts 6, and 8 can look in the direction of arrows 5 and 7 respectively.
Zur zeichnerischen Vereinfachung ist die Blickrichtung 5 genau geradeausblickend, also in Richtung der Achse des Schaftrohres 2 dargestellt und die Blickrichtung 7 liegt bei 45°. Üblichere Blickrichtungen liegen stattdessen bei ca. 12° für die Blickrichtung 5 und ca. 30° für die Blickrichtung 7. For drawing simplification, the viewing direction 5 is exactly straight ahead, that is shown in the direction of the axis of the shaft tube 2 and the line of sight 7 is at 45 °. More usual viewing directions are instead at about 12 ° for the viewing direction 5 and about 30 ° for the viewing direction 7.
Zur Beleuchtung des durch die Fenster 11, 12 betrachtbaren Blickfeldes ist ein Lichtleitfaserbündel 13 vorgesehen, dessen proximales Ende in einem Lichtleiteranschlussstutzen 14 liegt, welcher in üblicher Ausbildung seitlich vom Hauptkörper 3 abgeht und in bekannter Ausbildung zum Anschluss eines Lichtleiterkabels ausgebildet sein kann, mit dem Licht von einer entfernt aufgestellten Lichtquelle zum proximalen Ende des Lichtleitfaserbündels 13 transportiert und dort in dieses gekoppelt werden kann. Das Lichtleitfaserbündel 13 teilt sich im Hauptkörper 3 in insgesamt vier Teilbündel 15, 16, 17 und 18, die im Querschnitt der Fig. 3 zu sehen sind. In Fig. 1 sind davon nur die beiden zum Betrachter hin liegenden Teilbündel 15 und 16 zu sehen. Die Teilbündel 17 und 18 verlaufen parallel zu den Teilbündeln 15 und 16. In order to illuminate the field of view that can be observed through the windows 11, 12, an optical fiber bundle 13 is provided, the proximal end of which is located in a light conductor connecting piece 14, which in a conventional design extends laterally from the main body 3 and can be formed in a known configuration for connecting a light conductor cable to the light transported from a remote light source to the proximal end of the optical fiber bundle 13 and can be coupled there in this. The optical fiber bundle 13 is divided in the main body 3 in a total of four sub-beams 15, 16, 17 and 18, which can be seen in the cross section of Fig. 3. In Fig. 1, only the two lying to the viewer sub-beams 15 and 16 are seen. The sub-beams 17 and 18 are parallel to the sub-beams 15 and 16.
An den distalen Enden sind die Teilbündel parallel zu den Objektivteilen 6 und 8, bzw. zu den Pfeilen der Blickrichtungen 5 und 7 ausgerichtet und enden in den Stimflächenteilen 9 und 10 mit ihren abstrahlenden Endflächen, wie dies in Fig. 2 dargestellt ist. At the distal ends, the partial bundles are aligned parallel to the objective parts 6 and 8, or to the arrows of the viewing directions 5 and 7, and terminate in the front face parts 9 and 10 with their radiating end faces, as shown in FIG.
Alternativ können anstelle des einen Lichtleitfaserbündel 13 zwei solche Bündel verwendet werden, die getrennt versorgt werden und anders verzweigen, um jeweils einer Blickrichtung zugeordnet zu sein. Vergleicht man mit Fig. 3, dann kann also das eine dieser Bündel in die Teilbündel 16 und 18 verzweigen und sorgt für die Beleuchtung in Blickrichtung 7, während das andere Bündel die Teilbündel 15 und 17 und somit die Geradeausblickrichtung 5 versorgt. Durch Ein- und Ausschalten der beiden Bündel kann somit das Licht in den Richtungen 5 und 7 getrennt geschaltet werden. Alternatively, instead of the one optical fiber bundle 13, two such bundles may be used, which are supplied separately and branch differently, so as to be associated with a respective viewing direction. If one compares with FIG. 3, then one of these bundles can branch into the partial bundles 16 and 18 and provides the illumination in the viewing direction 7, while the other bundle supplies the partial bundles 15 and 17 and thus the straight-ahead direction 5. By switching the two bundles on and off, the light in the directions 5 and 7 can thus be switched separately.
Der Bildleiter 4 endet, wie Fig. 1 zeigt, proximal in einem Okular 19, an dessen Stelle auch eine Videokamera ankuppelbar ist. Anstelle des langgestreckt das Schaftrohr 2 durchlaufenden Bildleiters 4 kann im distalen Endbereich an der Stelle, an der die Objektivteile 6 und 8 zum gemeinsamen Bildleiter 4 vereinigt sind, eine Videokamera angeordnet sein. The image conductor 4 ends, as shown in FIG. 1, proximally in an eyepiece 19, in its place a video camera is coupled. Instead of the elongated shaft 4 passing through the image guide 4 can be arranged in the distal end region at the point where the lens parts 6 and 8 to the common image guide 4, a video camera.
Fig. 3 zeigt, in distaler Richtung blickend, einen Querschnitt des Schaftrohres 2 mit geschnittenem Bildleiter 4 und den geschnittenen Teilbündeln 15, 16, 17 und 18 des Lichtleitfaserbündels. Es ist hier auch ein Faserrohr 20 geschnitten darge- stellt, das über die gesamte Länge des Schaftrohres 2 dem Bildleiter 4, 6, 8, von den Lichtleitfasern, also den Teilbündeln 15 bis 18, trennt. Das Faserrohr 20 ist mit ovalem Querschnitt ausgebildet, und zwar vorzugsweise mit über die Länge konstantem Querschnitt, um die Fertigungsprobleme zu verringern. Es kann in seinem ovalen Querschnitt relativ unproblematisch die beiden Objektivteile 6 und 8 aufnehmen, die in der Darstellung der Fig. 3 übereinanderliegen. Fig. 3 shows, looking in the distal direction, a cross section of the shaft tube 2 with cut image guide 4 and the cut part bundles 15, 16, 17 and 18 of the optical fiber bundle. It is here also a fiber tube 20 shown cut represents, over the entire length of the shaft tube 2 the image guide 4, 6, 8, from the optical fibers, so the sub-beams 15 to 18, separates. The fiber tube 20 is formed with an oval cross section, preferably with a constant cross section over the length, in order to reduce manufacturing problems. It can record relatively problematic in its oval cross-section, the two lens parts 6 and 8, which lie one above the other in the illustration of FIG.
Der zwischen den beiden Rohren 2 und 20 verbleibende frei Querschnitt ist bei der in Fig. 3 dargestellten Konstruktion in zwei Teilquerschnitte 21 und 22 unterteilt, die bei der dargestellten Ausführungsform sogar völlig voneinander getrennt sind, da sich die beiden Rohre 2, 20 nur an zwei Linien berühren. The remaining between the two tubes 2 and 20 free cross-section is divided in the construction shown in Fig. 3 in two partial sections 21 and 22, which are even completely separated in the illustrated embodiment, since the two tubes 2, 20 only two Touch lines.
Die Teilquerschnitte 21 und 22 bieten günstige Querschnittsformen zur Unterbringung der Teilbündel 15 und 16, bzw. 17 und 18. The partial cross sections 21 and 22 offer favorable cross-sectional shapes for accommodating the sub-beams 15 and 16, and 17 and 18, respectively.
Abweichend von den dargestellten Querschnitten können auch andere Querschnittsformen verwendet werden. Das Schaftrohr 2 könnte z.B. mit mehreckigem Querschnitt ausgebildet sei oder ebenfalls oval sein, allerdings mit der grössten Querschnittserstreckung vorteilhaft senkrecht zu der des Faserrohres 20. Auch das Faserrohr 20 kann mit anderem Querschnitt ausgebildet sein, z.B. länglich rechteckig. Deviating from the cross sections shown, other cross-sectional shapes can be used. The shaft tube 2 could e.g. be formed with polygonal cross-section or also be oval, but with the greatest cross-sectional extension advantageously perpendicular to that of the fiber tube 20. Also, the fiber tube 20 may be formed with a different cross-section, e.g. oblong rectangular.

Claims

PATENTANSPRÜCHE: CLAIMS:
1. Endoskop (1) mit einem Schaftrohr (2), das von einem Faserrohr (20) durchlaufen ist, welches einen Bildleiter (4) mit distalem Objektiv (6, 8) umschließt, wobei in dem freien Querschnitt (21, 22) zwischen dem Faserrohr (20) und dem Schaftrohr (2) ein Lichtieitfaserbündel (13) angeordnet ist, dadurch gekennzeichnet, dass das Faserrohr (20) von länglichem Querschnitt ist. 1. endoscope (1) with a shaft tube (2), which is traversed by a fiber tube (20) which encloses an image guide (4) with distal objective (6, 8), wherein in the free cross section (21, 22) between the fiber tube (20) and the shaft tube (2) a Lichtieitfaserbündel (13) is arranged, characterized in that the fiber tube (20) is of elongated cross-section.
2. Endoskop nach Anspruch 1, dadurch gekennzeichnet, dass das Objektiv (6, 8) mit zwei Blickrichtungen (5, 7) ausgebildet ist und mit seiner größeren Querschnittserstreckung in Richtung der größeren Querschnittserstreckung des Faserrohres (20) angeordnet ist. 2. An endoscope according to claim 1, characterized in that the lens (6, 8) with two viewing directions (5, 7) is formed and is arranged with its larger cross-sectional extent in the direction of the larger cross-sectional extent of the fiber tube (20).
3. Endoskop nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Faserrohr (20) im Schaftrohr (2) derart angeordnet ist, dass es den freien Querschnitt in zwei Teilquerschnitte (21, 22) teilt, wobei das im proximalen Endbereich verzweigende Lichtleitfaserbündel (13) in jedem der beiden Teilquerschnitte (21, 22) mit Teilen (15, 16; 17, 18) angeordnet ist. 3. Endoscope according to one of the preceding claims, characterized in that the fiber tube (20) in the shaft tube (2) is arranged such in that it divides the free cross section into two partial cross sections (21, 22), wherein the optical fiber bundle (13) branching in the proximal end region is arranged in each of the two partial cross sections (21, 22) with parts (15, 16, 17, 18).
Endoskop nach Anspruch 3, dadurch gekennzeichnet, dass das Lichtleitfaserbündel (13) in vier Teilbündel (15, 16, 17, 18) verzweigt, von denen je zwei in jedem der Teilquerschnitte (21, 22) angeordnet sind. Endoscope according to claim 3, characterized in that the optical fiber bundle (13) branches into four sub-beams (15, 16, 17, 18), of which two are arranged in each of the partial cross-sections (21, 22).
Endoskop nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Schaftrohr (2) von rundem Querschnitt ist. Endoscope according to one of the preceding claims, characterized in that the shaft tube (2) is of round cross-section.
Endoskop nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Faserrohr (20) von ovalem Querschnitt ist. Endoscope according to one of the preceding claims, characterized in that the fiber tube (20) is of oval cross section.
PCT/EP2011/005284 2010-12-27 2011-10-20 Endoscope having a shaft tube WO2012089289A1 (en)

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JP2013541225A JP5705328B2 (en) 2010-12-27 2011-10-20 Endoscope with cannula
US13/885,797 US9474437B2 (en) 2010-12-27 2011-10-20 Endoscope having a shaft tube
CN201180052519.9A CN103189780B (en) 2010-12-27 2011-10-20 Endoscope with handle pipe

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US20130267782A1 (en) 2013-10-10
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JP5705328B2 (en) 2015-04-22
JP2013545550A (en) 2013-12-26
US9474437B2 (en) 2016-10-25
DE102010056025A1 (en) 2012-06-28

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